Loading...
Please wait, while we are loading the content...
Similar Documents
An experimental study of fretting of gear teeth
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Krantz, Timothy L. |
| Copyright Year | 2008 |
| Description | Experiments were conducted to study fretting of gears. The gears were made from case-carburized AISI 9310 alloy to match the material of a flight actuator gearbox of interest. The objective of the testing was to produce damage representative of that observed on flight hardware. The following correlations and observations were noted. The amplitude of dithering motion very strongly influenced the type and magnitude of damage. Sliding amounts on the order of 30% of the width of the line contact were judged to most readily produce fretting damage. There was observed an incubation period on the order of tens-of-thousands of cycles, and the incubation period was influenced by surface roughness, torque, and the motion extent. Fretting damage could be produced for any of the torques tested, and the severity of damage increased slightly with torque. Gear teeth having surface roughness of 0.7-0.8 micrometer were somewhat more resistant to fretting than were smoother surfaces. |
| File Size | 6189039 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080047432 |
| Archival Resource Key | ark:/13960/t3sv2k202 |
| Language | English |
| Publisher Date | 2008-05-21 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Cycles Torque Fretting Gears Dithers Sliding Surface Roughness Carburizing Transmissions Machine Elements Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
